* [Langfuse v4.22.0](https://github.com/langfuse/langfuse) – LLM engineering platform for collaboratively developing, monitoring, evaluating, and debugging AI applications.

* [langfuse-js v5.11.0](https://github.com/langfuse/langfuse-js) – JS/TS SDKs for instrumenting LLM apps with detailed tracing and observability.

* [Promptfoo 0.122.1](https://github.com/promptfoo/promptfoo) – Developer-friendly local tool for testing, evaluating, and securing large language model applications.

* [Ferro Labs AI Gateway v1.4.5](https://github.com/ferro-labs/ai-gateway) – High-performance Go-based AI gateway routing OpenAI-compatible LLM requests across 30+ providers with caching, guardrails, and cost controls.